Cats are so well-designed, I’d love to see concept art for them
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Proailurus, believed to be the very first of the cat family. it lived in europe 25 million years ago and was about the size of a large housecat. it pretty much looks like somebody jammed a cat and a weasel into a blender, and is the ancestor of all current cats.
A sand pendulum that creates a beautiful pattern only by its movement.
But why does the ellipse change shape?
The pattern gets smaller because energy is not conserved (and in fact decreases) in the system. The mass in the pendulum gets smaller and the center of mass lowers as a function of time. Easy as that, an amazing pattern arises through the laws of physics.
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